Snatch block



y A. G. FRANKI-IIOUSQERI SNATCH BLOCK Filed April 5, 1944 2 Sheets-Sheetl INVEN'ILOR- I ALBERT G. FRANKHOUSER BY OH ATTORNEYS July 1,1947.

A. G. FRANK l- IOU SER SNA'IfCH BLOCK" Filed April 5, 1944 INVENTOR 1ALBERT 5. FRANKHOUSER BY 7 v a? ATTCJRNEYS Patented July 1, 1947 SNATCHBLOCK Albert G. Frankhouser, Lima, Ohio, assignor to The H. G. ShookCompany, Lima, Ohio, a corporation of Ohio Application April 3, 1944,Serial No. 529,328

This invention relates to a snatch block, and more particularly dealswith a block of the opening type which may be opened under full load togain access to the sheaves or pulleys.

The nature of the present invention will be fully understood from thefollowing description taken in connection with the annexed drawings,wherein:

Fig. l is a side elevaticnal view, partly in crosssection, of the snatchblock of the present invention.

Fig. 2 is an end elevational view, partly in cross-section and with someelements removed, illustrating a three-sheave block.

Fig. 3 is an end elevational view, partly in cross-section, similar toFig. 2 but illustrating a four-sheave block; and,

Fig. i is an end elevational view, partly in cross-section, similar toFigs. 2 and 3 but illustrating a five-sheave block.

Referring to Fig. 1, iii is a top ring mounted on a hanger H, and i2 isthe bottom ring mounted on a hanger IS. The hanger H is carried by abolt iZa which also supports a fork, clevis or bracket lta and a secondfork, clevis or bracket 14 (see Fig. 2). The fork We and the fork i areprovided with a hole is adapted to receive a cotter pin it, and they arealso provided with another hole I! adapted to receive a. pin IS. Theprongs of the forks l3a and M are drilled to receive a sectional insertIt. The lower portion of the hanger H is drilled in juxtaposition withthe drilling of the prongs of the forks Ida and i4, and each section ofthe insert it (which consists of 2 parts) passes through the severalprongs of one fork and into the opening on the lower portion of thehanger H. As illustrated in Fig. 2, the insert 19 passes through theprongs of the fork Ida and half way into the opening at the lowerportion of the hanger H and is locked in place by the pin it and by thecotter pin it. When the cotter pin it is removed, the pin 56 may be usedas a handle for withdrawing the insert [9. The other half or section ofthe insert 59 is shown withdrawn as the invention is illustrated in Fig.2.

Referring further to Fig. 1 and Fig. 2, it and El are the side plates ofthe block and are hung on the insert l9 and thus supported by the forks[3a and M respectively. The side plates 29 and 2! are held together atthe bottom portion thereof by a cross-bar 22a which also supports thehanger I3. Said plates 20 and 2!, with crossbar 22a, constitute a frameor shell. A plurality 9 Claims. (01. 25 i193) cf sheaves 22 aresupported between the side plates 2?] and by a bolt 23 provided with a,bushing 22. The sheaves are separated by spacer bars 25.

In Fig. 3, 25 is a top ring supporting a hanger through which passes abolt The bolt 28 also passes through a fork 29 and a fork 3d. The pron sof the fork 29, the prongs of the hanger 2i? and the prongs of the fork30 are drilled in juxtaposition to receive an insert 3i in two sectionsone of which sections is shown in place in Fig. 3 and the other sectionof which is not shown. The outer prong of the fork 2!! and the outerprong of the fork 3B are provided with an opening 32 adapted to receivea cotter pin 33, and the end of each section of the insert 3! isprovided with a pin 3 insertable in an opening 35 and adapted to serveas a handle when the insert it is to be withdrawn.

The forks 223 and 38 support side plates 36 and 3% which are joinedtogether at their lower portion by a bar 33 supporting a hanger 3%provided with a bottom ring it. On the side plates 38 and 3'? is mounteda bearing bolt ti provided with a bushing 512 and supporting a pluralityof sheaves or pulleys 33. A plurality of dividing plates t t, 55 and itare provided, each of which is supported by the insert 3%.

In Fig. l, ll is a top ring mounted on a hanger 38 which is drilled toreceive a bolt 49. On the bolt 4% are mounted a fork 5t and a fork 5i.The prongs of the fork 53 and of the fork 5i and the bottom portion ofthe hanger 58 are drilled in juxtaposition to receive an insert 5'2consisting of two parts, one of which parts is shown in position in Fig.4 and the other part of which is shown removed in Fig. 4. The outerprong of the fork 5E? and the outer prong of the fork 5| are providedwith an opening 53 adapted to receive a cotter pin 5 and the outer endsof each section of the insert 52 is provided with a pin 55 insertable inan opening 55 which serves as a handle to withdraw the insert 52 whenthe cotter pin 55: has been removed and the insert 52 is to be removed.

Side plates 58a and 51 are hung on the insert 52 and are joined at thelower portions thereof by a bar 58 which also supports a hanger 59provided with a bottom ring fit. A plurality of sheaves 6| are mountedbetween the side plates 56a and 51 on a, bearing bolt 6 provided with abushing 63, and a plurality of dividing plates 64, 65, 66 and 61 aremounted on the insert 52.

Referring to Fig. 2, if it should be desired to replace a rope or cablerunning over either of the outer sheaves, it is only necessary to removethe cotter pin Hi, withdraw one half of the insert I9 using the pin l8as a handle, moving to one side the fork |3a using the bolt [20. as apivot, and dropping the rope or cable over the sheave between the sideplate and the dividing plate. The fork I3a would then be dropped intoposition, the insert I9 would be replaced, and the cotter pin It wouldbe replaced and locked in position. This would place the block in propercondition for operation.

Still referring to Fig. 2, if it were desired to place a rope or cableover the center sheaveof the block it would only be necessary to removethe cotter pin l6, withdraw the 'insert 19 by pulling on the pin l8,pushing to one side the fork [3a, and causing the dividing plate thusreleased to fall freely. The rope or 'cable'could then be placed overthe center sheave and'the assembl brought to its original condition. Itwill be noted that in either event, the 1oad on the block would not haveto be removed. The full load would be carriedby one side plate and onedividing plate hung on one of the forks and on the hanger II by one halfof the insert l9.

Referring now to Fig. 3, it will be noted that the same procedure couldbe followed to place a rope over any of the sheaves, and that in everyinstance the full load would be carried by one half of the insert 3|,the dividing plate 45, the hanger 21 and either the side plate 36 andthe dividing plate 44 or the side plate 31 and the dividing plate '46.In no event would it be necessary to relieve the block of its load toreplace a rope or cable.

Referring now to Fig. 4, it will be noted that the same condition wouldexisthere. Irrespective of the sheave over which the rope or cable is tobe placed, the full load would be supported by one half the insert 52,the hanger 48 and either the side plate'56a and the dividing plates 64and 65 or the side plate 57 and the dividing plates 66 and 61, dependingon which side or half of the insert 52 is removed.

Those skilled in the art will readily understand that the snatch blockof the present invention offers many advantages over snatch blockspreviously known 'or used. It will be noted principally that in no eventis it necessary to relieve the load on the block in order to replace arope or cable over any of the sheaves.

It will be further understood that while there have been describedherein and illustrated in the annexed drawing certain embodiments ofthis invention, it is not intended thereby to "have this inventionlimited to or circumscribed by the specific details of construction,arrangement of parts, proportions or dimensions described orillustrated, in view of the fact that the present invention issusceptible to changes or modifications without departing from thespirit of this disclosure and the scope of the appended claims.

I claim:

1. In a pulley block, a frame including opposed side plates, a pluralityof pulleys pivoted on aligned axes in said frame, a hanger,-a pair ofclevises, means pivotingsaid'cleviseson opposite sides of said hanger,each clevis' beingadapted to embrace aportion of a respective plate,there being aligned holes in said "hanger, frame and clevises, andatwo-part pin,.each part .passing,

through a respective clevis,:plate, and intoLthe hole in said hanger,whereby said block :may be reeved by successive ;removal of said:pinlparts and pivoting of said clevises :iree of :said .frame.

2. A sheave block comprising .a shell including side plates, a pluralityof sheaves coaxially sides of said hanger, a frame having end plateseach-having a portion embraced by the respective clevises, 'a spacerplate between the forks of said hanger, a plurality of pulleys, pivotmeans for said pulleys passing through all said plates, eachpulley'being between a respective end plate and said center plate, therebeing aligned holes in said hanger, plates and clevises, a pivot pinpassing through said holes in one clevis, one end plate, one fork ofsaid hanger, and into said spacer plate, and a second pin passingthrough said holes in the-other clevis, end plate, fork of said-hangerand into said spacer plate .4. A snatch block comprising a frame, aplurality of sheaves pivoted in said frame, a hanger, brackets coaxiallypivoted on said hanger and depending-therefrom, and separate pinspassing through aligned holes in said frame, hanger and brackets, eachof said pins extending completely throughone only of said brackets andinto said hanger,

5. In a sheave block, a U-shaped frame having a plurality of sheavespivoted therein, a hanger, brackets pivoted on opposite sides of saidhanger and depending therefrom, there being normally aligned holes insaid hanger, brackets, and legs of said frame, and a two-part pinpassing through said holes, the adjacent ends of said parts lying withinthe hole in said hanger.

6. In a three-fold sheave block, a U-shaped frame having end plates, twospacer plates, sheaves pivotedin said frame on a common axis, eachsheave lying between a pair of plates, a hanger, clevises pivoted onopposite sides of said hanger and depending therefrom to embrace aport-ion of a corresponding frame plate, each spacer plate having aportion embraced between acorresponding side of said hanger and aclevis, and a two-part pin passing through aligned holes in said hanger,plates, and clevises, the adjacent ends of said parts lying within thehole in said hanger, whereby said block may be reeved by bighting.

'7. In a pulley block, a frame having side plates, pulley meansjournalled in said frame, a bracket associated with each of said sideplates, a connecting member passing through each of said brackets andthe associated said side plate, a hanger, and means pivotally connectingsaid hanger and said brackets, said hanger having a portion adapted forreceiving at least-the ends of said connecting members,

8. In apulley block, a pair of side plates, a plurality of pulleys,means journalling said pulleys between said plates, a hanger, a clevispivoted oneach side-of-said hanger, firstaligned holes in one-of saidclevises, the adjacent side plate and said hanger, second aligned holesin theothcr of said clevises, the other'of said side plates and saidhanger, first and second pins extending through said first and secondaligned holes respectively,'and means detachably securing said pins intheir respective holes.

6 9. In a sheave block, a plurality of sheaves REFERENCES CITED coaxiauypivoted plurality of plates separating The following references are ofrecord in the said sheaves and pivoted coaxially therewith, a me of thispatent, first bracket associated with a portion of said plates and asecond bracket associated with a 5 UN T D T S PA E TS remainder of saidplates, first and second con- Number Name Date necting means extendingthrough said first and 2 317 215 Parker et a1 Apt 20 1943 secondbrackets, respectively, and their asso- 2:082:169 McKiSSick June 1 1937ciated plates, a hanger pivotally secured to said 835 377 Bass NOV 131906 brackets, and means associated with said hangl0 er for receiving atleast the ends of both of said FOREIGN PATENTS connecting means? NumberCountry Date ALBERT G. FRANKHOUSER. 25,430 Great Britain 1899

